Flavin adenine dinucleotide disodium salt hydrate is a chemical compound that can be used as a substrate for nitrate reductase in the presence of molecular oxygen. Flavin adenine dinucleotide disodium salt hydrate can be used to identify mollicutes and diagnose radiation-induced lesions. The reaction mechanism involves the conversion of riboflavin 5'-adenosine monophosphate to riboflavin 5'-adenosine diphosphate by an enzyme called nitrate reductase, which are detected by a fluorescence detector.
Flavin adenine dinucleotide (FAD) is used as a redox cofactor (electron carrier) by flavoproteins including succinate dehydrogenase (complex), α-ketoglutarate dehydrogenase, apoptosis-inducing factor 2 (AIF-M2, AMID), folate/FAD-dependent tRNA methyltransferases, and N-hydroxylating flavoprotein monooxygenases. FAD is a component of the pyruvate dehydrogenase complex.